fix: yaml.safe_load is slow as hell

[VladimirFilonov]

Closes #3055

📑 Description

✅ Checks

• My pull request adheres to the code style of this project
• My code requires changes to the documentation
• I have updated the documentation as required
• All the tests have passed

ℹ Additional Information

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
keep	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jan 19, 2025 7:58am

[talboren]

lgtm

[codecov]

Codecov Report

Attention: Patch coverage is 34.69388% with 32 lines in your changes missing coverage. Please review.

Project coverage is 43.09%. Comparing base (e8cbcb3) to head (e212269).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
keep/api/routes/workflows.py	11.11%	8 Missing ⚠️
keep/workflowmanager/workflowstore.py	22.22%	7 Missing ⚠️
keep/parser/parser.py	14.28%	6 Missing ⚠️
keep/api/models/workflow.py	40.00%	3 Missing ⚠️
keep/actions/actions_factory.py	33.33%	2 Missing ⚠️
keep/api/routes/actions.py	33.33%	2 Missing ⚠️
keep/functions/cyaml.py	80.00%	2 Missing ⚠️
tests/test_parser.py	33.33%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3056      +/-   ##
==========================================
+ Coverage   43.06%   43.09%   +0.02%     
==========================================
  Files         166      167       +1     
  Lines       16685    16696      +11     
==========================================
+ Hits         7186     7195       +9     
- Misses       9499     9501       +2     

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